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PLUVIAL FLOODS. EFFECT OF CLIMATE CHANGE ON THE SEWER NETWORKS OPERATION.
Abstract
Sewerage networks form an integral part of urban infrastructure. It is necessary to reconsider the outdated concept of sewer networks and rainwater management in cities that do not meet sustainable development ideas. The new understanding of rainwater management needs to be adapted to the new environmental conditions caused by climate change. The occurrence of pluvial floods has recently become an increasingly common phenomenon. The reasons are outdated sewer networks, rapid urbanization, an increase in impervious areas, and changes in the characteristics of rainfall events caused by climate change. The aim of the paper is to examine the conditions of pluvial floods in urban areas. With the help of literature research, the leading causes and primary conditions of urban floods were summarized. More than 40 scientific publications in this area were studied during the research. The results of the investigated studies demonstrate the need to change the design concept of urban sewer networks. The usual method of wastewater management in cities was based on the concept of the fastest drainage of water from an urbanized area. This concept ensures the prevention of endangering human lives and property, limiting traffic and the negative impact of these waters on surface and groundwater quality. At present, high demands are placed on the protection of the urban environment. Many sewer networks were designed in the last century based on the conditions of the time. Due to the new conditions resulting from climate change, it is necessary to re-evaluate the functionality and capacity of individual networks.
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